Mask lens design and method for preventing and/or slowing myopia progression

Abstract

Contact lenses incorporate mask lens designs that at least one of slow, retard or preventing myopia progression. The lens includes a first zone at a center of the lens; at least one peripheral zone surrounding the center and having a dioptric power that is different than that at the center; and an opaque mask beginning at a radial distance from the center, thereby providing a lens power profile having substantially equivalent foveal vision correction to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression.

What is claimed is: 
     
       1. A method for at least one of slowing, retarding or preventing myopia progression by:
 providing an ophthalmic lens with a power profile having substantially equivalent foveal vision correction to a single vision lens, and having a depth of focus and reduced retinal image quality sensitivity that slows, retards, or prevents myopia progression, said power profile comprising a first zone at a center of an ophthalmic lens; at least one peripheral zone surrounding the center and having a dioptric power that is different than at the center; and an opaque mask extending from the at least one zone peripheral zone, the opaque mask being described by
     P ( r )= P   SEG ( r )+24×SQRT(5)× SA×r   2 /3.25 4 −12×SQRT× SA/ 3.25 2   ,r<r   MASK   (1)
 
 
 wherein P represents the dioptric power (D); 
 r represents a radial distance from a geometric lens center; 
 SA represents an amount of spherical aberration; and 
 P SEG (r) represents a step function that has a number of zones with different magnitudes; 
 and altering the growth of the eye. 
 
     
     
       2. The method according to  claim 1 , wherein the reduced retinal image quality sensitivity is in a range of 0.2 to 1.7 for accommodative states ranging from about 1 D to about 5 D. 
     
     
       3. The method according to  claim 1 , wherein the reduced retinal image quality sensitivity is in a range of 0.2 to 0.5 for accommodative states ranging from about 1 D to about 5 D. 
     
     
       4. The method according to  claim 1 , wherein the ophthalmic lens comprises a contact lens. 
     
     
       5. The method according to  claim 1 , wherein the ophthalmic lens compromises an intraocular lens, a corneal inlay, or a corneal onlay. 
     
     
       6. The method according to  claim 1 , wherein an inner radius of the mask begins at 2.0 mm to 3.0 mm from the center of the ophthalmic lens. 
     
     
       7. The method according to  claim 1 , wherein the mask comprises a colored or black ring. 
     
     
       8. The method according to  claim 1 , wherein power profile is a multifocal power profile and the at least one peripheral zone comprises two or more stepped zones. 
     
     
       9. The method according to  claim 1 , wherein the power profile is a continuous power profile and the at least one peripheral zone comprises a continuous transition between two or more zones having different dioptric powers. 
     
     
       10. The method according to  claim 1 , wherein the power profile is adjustable based on pupil size to achieve a balance between foveal vision correction and an effective depth of focus and reduced retinal image quality sensitivity for treating myopia progression. 
     
     
       11. The method according to  claim 1 , further comprising adding one or more stabilization zones into the lens.